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A valve body with an actuator drawn above it.
Also known as: Modulating valve symbol, Automatic control valve
On a piping and instrumentation diagram a control valve is drawn as a valve body with an actuator above it, modulating flow in response to a controller signal.
Denotes a valve whose position is set continuously by a control signal rather than by hand.
Contexts: Technical drawing
Carries an actuator symbol whose shape identifies whether it is pneumatic, electric or hydraulic, so the actuator rather than the body records how the valve is driven.
Contexts: Technical drawing
A valve bowtie with a vertical stem rising to a rounded or rectangular actuator drawn above the body.